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  <div class="headertitle">
<div class="title">qwt_widget_overlay.cpp</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/******************************************************************************</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Qwt Widget Library</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (C) 1997   Josef Wilgen</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * Copyright (C) 2002   Uwe Rathmann</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * This library is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * modify it under the terms of the Qwt License, Version 1.0</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *****************************************************************************/</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160; </div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor">#include &quot;qwt_widget_overlay.h&quot;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &quot;qwt_painter.h&quot;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160; </div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="preprocessor">#include &lt;qpainter.h&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="preprocessor">#include &lt;qpaintengine.h&gt;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="preprocessor">#include &lt;qpainterpath.h&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#include &lt;qimage.h&gt;</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#include &lt;qevent.h&gt;</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160; </div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#include &lt;cstdlib&gt;</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160; </div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="keyword">static</span> QImage::Format qwtMaskImageFormat()</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;{</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    <span class="keywordflow">if</span> ( <a class="code" href="class_qwt_painter.html#af352ad92f1c1dc8cfee0f3d799e2e26e">QwtPainter::isX11GraphicsSystem</a>() )</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;        <span class="keywordflow">return</span> QImage::Format_ARGB32;</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;    <span class="keywordflow">return</span> QImage::Format_ARGB32_Premultiplied;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;}</div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="keyword">static</span> QRegion qwtAlphaMask( <span class="keyword">const</span> QImage&amp; image, <span class="keyword">const</span> QRegion&amp; region )</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;{</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">int</span> w = image.width();</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">int</span> h = image.height();</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;    QRegion mask;</div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;    QRect rect;</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160; </div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor">#if QT_VERSION &gt;= 0x050800</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keywordflow">for</span> ( QRegion::const_iterator it = region.cbegin();</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;        it != region.cend(); ++it )</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;    {</div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;        <span class="keyword">const</span> QRect&amp; r = *it;</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    <span class="keyword">const</span> <a class="code" href="class_q_vector.html">QVector&lt; QRect &gt;</a> rects = region.rects();</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;    <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; rects.size(); i++ )</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    {</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;        <span class="keyword">const</span> QRect&amp; r = rects[i];</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;        <span class="keywordtype">int</span> x1, x2, y1, y2;</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;        r.getCoords( &amp;x1, &amp;y1, &amp;x2, &amp;y2 );</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160; </div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;        x1 = qMax( x1, 0 );</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;        x2 = qMin( x2, w - 1 );</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        y1 = qMax( y1, 0 );</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        y2 = qMin( y2, h - 1 );</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160; </div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> y = y1; y &lt;= y2; ++y )</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;        {</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;            <span class="keywordtype">bool</span> inRect = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;            <span class="keywordtype">int</span> rx0 = -1;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160; </div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;            <span class="keyword">const</span> uint* line =</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;                <span class="keyword">reinterpret_cast&lt;</span> <span class="keyword">const </span>uint* <span class="keyword">&gt;</span> ( image.scanLine( y ) ) + x1;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;            <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> x = x1; x &lt;= x2; x++ )</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;            {</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                <span class="keyword">const</span> <span class="keywordtype">bool</span> on = ( ( *line++ &gt;&gt; 24 ) != 0 );</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                <span class="keywordflow">if</span> ( on != inRect )</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                {</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                    <span class="keywordflow">if</span> ( inRect  )</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;                    {</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;                        rect.setCoords( rx0, y, x - 1, y );</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                        mask += rect;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;                    }</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;                    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                    {</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;                        rx0 = x;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;                    }</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160; </div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;                    inRect = on;</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;                }</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;            }</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160; </div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;            <span class="keywordflow">if</span> ( inRect )</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;            {</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;                rect.setCoords( rx0, y, x2, y );</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;                mask = mask.united( rect );</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;            }</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;        }</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    }</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160; </div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    <span class="keywordflow">return</span> mask;</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;}</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160; </div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;<span class="keyword">class </span>QwtWidgetOverlay::PrivateData</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;{</div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;  <span class="keyword">public</span>:</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    PrivateData()</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;        : <a class="code" href="class_qwt_widget_overlay.html#a8bc543750c853240841b9931ad167a90">maskMode</a>( <a class="code" href="class_qwt_widget_overlay.html">QwtWidgetOverlay</a>::<a class="code" href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fcaa3c2ba9dd41304c6a6524ee5f7c70540">MaskHint</a> )</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;        , <a class="code" href="class_qwt_widget_overlay.html#aaa37eb374f4a8886154e86f7531d9264">renderMode</a>( <a class="code" href="class_qwt_widget_overlay.html">QwtWidgetOverlay</a>::<a class="code" href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8a831530722d8dc0e42aabfbcacbb6ecc6">AutoRenderMode</a> )</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;        , rgbaBuffer( NULL )</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    {</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    }</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160; </div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;    ~PrivateData()</div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    {</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;        resetRgbaBuffer();</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    }</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160; </div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    <span class="keywordtype">void</span> resetRgbaBuffer()</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    {</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;        <span class="keywordflow">if</span> ( rgbaBuffer )</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;        {</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;            std::free( rgbaBuffer );</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;            rgbaBuffer = NULL;</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;        }</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    }</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160; </div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    <a class="code" href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fc">MaskMode</a> <a class="code" href="class_qwt_widget_overlay.html#a8bc543750c853240841b9931ad167a90">maskMode</a>;</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <a class="code" href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8">RenderMode</a> <a class="code" href="class_qwt_widget_overlay.html#aaa37eb374f4a8886154e86f7531d9264">renderMode</a>;</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    uchar* rgbaBuffer;</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;};</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160; </div>
<div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#afeb3615cf79bee41bbae21f3b92b924d">  126</a></span>&#160;<a class="code" href="class_qwt_widget_overlay.html#afeb3615cf79bee41bbae21f3b92b924d">QwtWidgetOverlay::QwtWidgetOverlay</a>( QWidget* widget )</div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    : QWidget( widget )</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;{</div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    m_data = <span class="keyword">new</span> PrivateData;</div>
<div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160; </div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;    setAttribute( Qt::WA_TransparentForMouseEvents );</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;    setAttribute( Qt::WA_NoSystemBackground );</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;    setFocusPolicy( Qt::NoFocus );</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160; </div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;    <span class="keywordflow">if</span> ( widget )</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160;    {</div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;        resize( widget-&gt;size() );</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160;        widget-&gt;installEventFilter( <span class="keyword">this</span> );</div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;    }</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;}</div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160; </div>
<div class="line"><a name="l00143"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#af234383cb42288746b970fb3fa18395d">  143</a></span>&#160;<a class="code" href="class_qwt_widget_overlay.html#af234383cb42288746b970fb3fa18395d">QwtWidgetOverlay::~QwtWidgetOverlay</a>()</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;{</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    <span class="keyword">delete</span> m_data;</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;}</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160; </div>
<div class="line"><a name="l00154"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#a56828c036263679fc95087bd87496df0">  154</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="class_qwt_widget_overlay.html#a56828c036263679fc95087bd87496df0">QwtWidgetOverlay::setMaskMode</a>( <a class="code" href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fc">MaskMode</a> mode )</div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;{</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    <span class="keywordflow">if</span> ( mode != m_data-&gt;maskMode )</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    {</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;        m_data-&gt;maskMode = mode;</div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;        m_data-&gt;resetRgbaBuffer();</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    }</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;}</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160; </div>
<div class="line"><a name="l00167"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#a8bc543750c853240841b9931ad167a90">  167</a></span>&#160;<a class="code" href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fc">QwtWidgetOverlay::MaskMode</a> <a class="code" href="class_qwt_widget_overlay.html#a8bc543750c853240841b9931ad167a90">QwtWidgetOverlay::maskMode</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    <span class="keywordflow">return</span> m_data-&gt;maskMode;</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;}</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160; </div>
<div class="line"><a name="l00178"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#a80fd06e2111993848f45a21627ec09b4">  178</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="class_qwt_widget_overlay.html#a80fd06e2111993848f45a21627ec09b4">QwtWidgetOverlay::setRenderMode</a>( <a class="code" href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8">RenderMode</a> mode )</div>
<div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;{</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    m_data-&gt;renderMode = mode;</div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;}</div>
<div class="line"><a name="l00182"></a><span class="lineno">  182</span>&#160; </div>
<div class="line"><a name="l00187"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#aaa37eb374f4a8886154e86f7531d9264">  187</a></span>&#160;<a class="code" href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8">QwtWidgetOverlay::RenderMode</a> <a class="code" href="class_qwt_widget_overlay.html#aaa37eb374f4a8886154e86f7531d9264">QwtWidgetOverlay::renderMode</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;    <span class="keywordflow">return</span> m_data-&gt;renderMode;</div>
<div class="line"><a name="l00190"></a><span class="lineno">  190</span>&#160;}</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160; </div>
<div class="line"><a name="l00195"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#a231231eebaf7655f8264d2ee2b03127c">  195</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="class_qwt_widget_overlay.html#a231231eebaf7655f8264d2ee2b03127c">QwtWidgetOverlay::updateOverlay</a>()</div>
<div class="line"><a name="l00196"></a><span class="lineno">  196</span>&#160;{</div>
<div class="line"><a name="l00197"></a><span class="lineno">  197</span>&#160;    updateMask();</div>
<div class="line"><a name="l00198"></a><span class="lineno">  198</span>&#160;    update();</div>
<div class="line"><a name="l00199"></a><span class="lineno">  199</span>&#160;}</div>
<div class="line"><a name="l00200"></a><span class="lineno">  200</span>&#160; </div>
<div class="line"><a name="l00201"></a><span class="lineno">  201</span>&#160;<span class="keywordtype">void</span> QwtWidgetOverlay::updateMask()</div>
<div class="line"><a name="l00202"></a><span class="lineno">  202</span>&#160;{</div>
<div class="line"><a name="l00203"></a><span class="lineno">  203</span>&#160;    m_data-&gt;resetRgbaBuffer();</div>
<div class="line"><a name="l00204"></a><span class="lineno">  204</span>&#160; </div>
<div class="line"><a name="l00205"></a><span class="lineno">  205</span>&#160;    QRegion mask;</div>
<div class="line"><a name="l00206"></a><span class="lineno">  206</span>&#160; </div>
<div class="line"><a name="l00207"></a><span class="lineno">  207</span>&#160;    <span class="keywordflow">if</span> ( m_data-&gt;maskMode == <a class="code" href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fcaa3c2ba9dd41304c6a6524ee5f7c70540">QwtWidgetOverlay::MaskHint</a> )</div>
<div class="line"><a name="l00208"></a><span class="lineno">  208</span>&#160;    {</div>
<div class="line"><a name="l00209"></a><span class="lineno">  209</span>&#160;        mask = <a class="code" href="class_qwt_widget_overlay.html#ace7c2004890a1bf6e0a01d210ee39007">maskHint</a>();</div>
<div class="line"><a name="l00210"></a><span class="lineno">  210</span>&#160;    }</div>
<div class="line"><a name="l00211"></a><span class="lineno">  211</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( m_data-&gt;maskMode == <a class="code" href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fca263c0fea842a8d4957ded6f5e47f734e">QwtWidgetOverlay::AlphaMask</a> )</div>
<div class="line"><a name="l00212"></a><span class="lineno">  212</span>&#160;    {</div>
<div class="line"><a name="l00213"></a><span class="lineno">  213</span>&#160;        <span class="comment">// TODO: the image doesn&#39;t need to be larger than</span></div>
<div class="line"><a name="l00214"></a><span class="lineno">  214</span>&#160;        <span class="comment">//       the bounding rectangle of the hint !!</span></div>
<div class="line"><a name="l00215"></a><span class="lineno">  215</span>&#160; </div>
<div class="line"><a name="l00216"></a><span class="lineno">  216</span>&#160;        QRegion hint = <a class="code" href="class_qwt_widget_overlay.html#ace7c2004890a1bf6e0a01d210ee39007">maskHint</a>();</div>
<div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;        <span class="keywordflow">if</span> ( hint.isEmpty() )</div>
<div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;            hint += QRect( 0, 0, width(), height() );</div>
<div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160; </div>
<div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;        <span class="comment">// A fresh buffer from calloc() is usually faster</span></div>
<div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;        <span class="comment">// than reinitializing an existing one with</span></div>
<div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;        <span class="comment">// QImage::fill( 0 ) or memset()</span></div>
<div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160; </div>
<div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;        m_data-&gt;rgbaBuffer = ( uchar* )::calloc( width() * height(), 4 );</div>
<div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160; </div>
<div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;        QImage image( m_data-&gt;rgbaBuffer,</div>
<div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;            width(), height(), qwtMaskImageFormat() );</div>
<div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160; </div>
<div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;        QPainter painter( &amp;image );</div>
<div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;        draw( &amp;painter );</div>
<div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;        painter.end();</div>
<div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160; </div>
<div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;        mask = qwtAlphaMask( image, hint );</div>
<div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160; </div>
<div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;        <span class="keywordflow">if</span> ( m_data-&gt;renderMode == <a class="code" href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8ab4b3bfef277a5231f8632a6800a256d8">QwtWidgetOverlay::DrawOverlay</a> )</div>
<div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;        {</div>
<div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;            <span class="comment">// we don&#39;t need the buffer later</span></div>
<div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;            m_data-&gt;resetRgbaBuffer();</div>
<div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;        }</div>
<div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    }</div>
<div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160; </div>
<div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;    <span class="comment">// A bug in Qt initiates a full repaint of the widget</span></div>
<div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;    <span class="comment">// when we change the mask, while we are visible !</span></div>
<div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160; </div>
<div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;    setVisible( <span class="keyword">false</span> );</div>
<div class="line"><a name="l00246"></a><span class="lineno">  246</span>&#160; </div>
<div class="line"><a name="l00247"></a><span class="lineno">  247</span>&#160;    <span class="keywordflow">if</span> ( mask.isEmpty() )</div>
<div class="line"><a name="l00248"></a><span class="lineno">  248</span>&#160;        clearMask();</div>
<div class="line"><a name="l00249"></a><span class="lineno">  249</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00250"></a><span class="lineno">  250</span>&#160;        setMask( mask );</div>
<div class="line"><a name="l00251"></a><span class="lineno">  251</span>&#160; </div>
<div class="line"><a name="l00252"></a><span class="lineno">  252</span>&#160;    setVisible( <span class="keyword">true</span> );</div>
<div class="line"><a name="l00253"></a><span class="lineno">  253</span>&#160;}</div>
<div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160; </div>
<div class="line"><a name="l00261"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#add1d4279859464de97247350734715f8">  261</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="class_qwt_widget_overlay.html#add1d4279859464de97247350734715f8">QwtWidgetOverlay::paintEvent</a>( QPaintEvent* event )</div>
<div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;{</div>
<div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    <span class="keyword">const</span> QRegion&amp; clipRegion = <span class="keyword">event</span>-&gt;region();</div>
<div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160; </div>
<div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;    QPainter painter( <span class="keyword">this</span> );</div>
<div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160; </div>
<div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;    <span class="keywordtype">bool</span> useRgbaBuffer = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;    <span class="keywordflow">if</span> ( m_data-&gt;renderMode == <a class="code" href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8a923e121c1d01bb72deb897a6f913aaf5">QwtWidgetOverlay::CopyAlphaMask</a> )</div>
<div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;    {</div>
<div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;        useRgbaBuffer = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;    }</div>
<div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;    <span class="keywordflow">else</span> <span class="keywordflow">if</span> ( m_data-&gt;renderMode == <a class="code" href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8a831530722d8dc0e42aabfbcacbb6ecc6">QwtWidgetOverlay::AutoRenderMode</a> )</div>
<div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    {</div>
<div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;        <span class="keywordflow">if</span> ( painter.paintEngine()-&gt;type() == QPaintEngine::Raster )</div>
<div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;            useRgbaBuffer = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;    }</div>
<div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160; </div>
<div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;    <span class="keywordflow">if</span> ( m_data-&gt;rgbaBuffer &amp;&amp; useRgbaBuffer )</div>
<div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;    {</div>
<div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;        <span class="keyword">const</span> QImage image( m_data-&gt;rgbaBuffer,</div>
<div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;            width(), height(), qwtMaskImageFormat() );</div>
<div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160; </div>
<div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">int</span> rectCount = clipRegion.rectCount();</div>
<div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160; </div>
<div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;        <span class="keywordflow">if</span> ( rectCount &gt; 2000 )</div>
<div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;        {</div>
<div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;            <span class="comment">// the region is to complex</span></div>
<div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;            painter.setClipRegion( clipRegion );</div>
<div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160; </div>
<div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;            <span class="keyword">const</span> QRect r = clipRegion.boundingRect();</div>
<div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;            painter.drawImage( r.topLeft(), image, r );</div>
<div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;        }</div>
<div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;        <span class="keywordflow">else</span></div>
<div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;        {</div>
<div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;<span class="preprocessor">#if QT_VERSION &gt;= 0x050800</span></div>
<div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;            <span class="keywordflow">for</span> ( QRegion::const_iterator it = clipRegion.cbegin();</div>
<div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;                it != clipRegion.cend(); ++it )</div>
<div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;            {</div>
<div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;                <span class="keyword">const</span> QRect&amp; r = *it;</div>
<div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;                painter.drawImage( r.topLeft(), image, r );</div>
<div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;            }</div>
<div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;            <span class="keyword">const</span> <a class="code" href="class_q_vector.html">QVector&lt; QRect &gt;</a> rects = clipRegion.rects();</div>
<div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;            <span class="keywordflow">for</span> ( <span class="keywordtype">int</span> i = 0; i &lt; rects.size(); i++ )</div>
<div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;            {</div>
<div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;                <span class="keyword">const</span> QRect&amp; r = rects[i];</div>
<div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;                painter.drawImage( r.topLeft(), image, r );</div>
<div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;            }</div>
<div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;        }</div>
<div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;    }</div>
<div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;    <span class="keywordflow">else</span></div>
<div class="line"><a name="l00313"></a><span class="lineno">  313</span>&#160;    {</div>
<div class="line"><a name="l00314"></a><span class="lineno">  314</span>&#160;        painter.setClipRegion( clipRegion );</div>
<div class="line"><a name="l00315"></a><span class="lineno">  315</span>&#160;        draw( &amp;painter );</div>
<div class="line"><a name="l00316"></a><span class="lineno">  316</span>&#160;    }</div>
<div class="line"><a name="l00317"></a><span class="lineno">  317</span>&#160;}</div>
<div class="line"><a name="l00318"></a><span class="lineno">  318</span>&#160; </div>
<div class="line"><a name="l00323"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#ac3b6ff63f7d967a11dbcdbba5e87fba3">  323</a></span>&#160;<span class="keywordtype">void</span> <a class="code" href="class_qwt_widget_overlay.html#ac3b6ff63f7d967a11dbcdbba5e87fba3">QwtWidgetOverlay::resizeEvent</a>( QResizeEvent* event )</div>
<div class="line"><a name="l00324"></a><span class="lineno">  324</span>&#160;{</div>
<div class="line"><a name="l00325"></a><span class="lineno">  325</span>&#160;    Q_UNUSED( event );</div>
<div class="line"><a name="l00326"></a><span class="lineno">  326</span>&#160; </div>
<div class="line"><a name="l00327"></a><span class="lineno">  327</span>&#160;    m_data-&gt;resetRgbaBuffer();</div>
<div class="line"><a name="l00328"></a><span class="lineno">  328</span>&#160;}</div>
<div class="line"><a name="l00329"></a><span class="lineno">  329</span>&#160; </div>
<div class="line"><a name="l00330"></a><span class="lineno">  330</span>&#160;<span class="keywordtype">void</span> QwtWidgetOverlay::draw( QPainter* painter )<span class="keyword"> const</span></div>
<div class="line"><a name="l00331"></a><span class="lineno">  331</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00332"></a><span class="lineno">  332</span>&#160;    <span class="keywordflow">if</span> ( QWidget* widget = parentWidget() )</div>
<div class="line"><a name="l00333"></a><span class="lineno">  333</span>&#160;    {</div>
<div class="line"><a name="l00334"></a><span class="lineno">  334</span>&#160;        painter-&gt;setClipRect( widget-&gt;contentsRect() );</div>
<div class="line"><a name="l00335"></a><span class="lineno">  335</span>&#160; </div>
<div class="line"><a name="l00336"></a><span class="lineno">  336</span>&#160;        <span class="comment">// something special for the plot canvas</span></div>
<div class="line"><a name="l00337"></a><span class="lineno">  337</span>&#160; </div>
<div class="line"><a name="l00338"></a><span class="lineno">  338</span>&#160;        <span class="keyword">const</span> <span class="keywordtype">int</span> idx = widget-&gt;metaObject()-&gt;indexOfMethod( <span class="stringliteral">&quot;borderPath(QRect)&quot;</span> );</div>
<div class="line"><a name="l00339"></a><span class="lineno">  339</span>&#160;        <span class="keywordflow">if</span> ( idx &gt;= 0 )</div>
<div class="line"><a name="l00340"></a><span class="lineno">  340</span>&#160;        {</div>
<div class="line"><a name="l00341"></a><span class="lineno">  341</span>&#160;            QPainterPath clipPath;</div>
<div class="line"><a name="l00342"></a><span class="lineno">  342</span>&#160; </div>
<div class="line"><a name="l00343"></a><span class="lineno">  343</span>&#160;            ( void )QMetaObject::invokeMethod(</div>
<div class="line"><a name="l00344"></a><span class="lineno">  344</span>&#160;                widget, <span class="stringliteral">&quot;borderPath&quot;</span>, Qt::DirectConnection,</div>
<div class="line"><a name="l00345"></a><span class="lineno">  345</span>&#160;                Q_RETURN_ARG( QPainterPath, clipPath ), Q_ARG( QRect, rect() ) );</div>
<div class="line"><a name="l00346"></a><span class="lineno">  346</span>&#160; </div>
<div class="line"><a name="l00347"></a><span class="lineno">  347</span>&#160;            <span class="keywordflow">if</span> (!clipPath.isEmpty() )</div>
<div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;                painter-&gt;setClipPath( clipPath, Qt::IntersectClip );</div>
<div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;        }</div>
<div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;    }</div>
<div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160; </div>
<div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;    <a class="code" href="class_qwt_widget_overlay.html#abb69235d3eba71b6dde354c668dd2611">drawOverlay</a>( painter );</div>
<div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;}</div>
<div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160; </div>
<div class="line"><a name="l00373"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#ace7c2004890a1bf6e0a01d210ee39007">  373</a></span>&#160;QRegion <a class="code" href="class_qwt_widget_overlay.html#ace7c2004890a1bf6e0a01d210ee39007">QwtWidgetOverlay::maskHint</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;<span class="keyword"></span>{</div>
<div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;    <span class="keywordflow">return</span> QRegion();</div>
<div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;}</div>
<div class="line"><a name="l00377"></a><span class="lineno">  377</span>&#160; </div>
<div class="line"><a name="l00389"></a><span class="lineno"><a class="line" href="class_qwt_widget_overlay.html#a57b667e51da323b6ad050646782f7557">  389</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="class_qwt_widget_overlay.html#a57b667e51da323b6ad050646782f7557">QwtWidgetOverlay::eventFilter</a>( QObject* <span class="keywordtype">object</span>, QEvent* event )</div>
<div class="line"><a name="l00390"></a><span class="lineno">  390</span>&#160;{</div>
<div class="line"><a name="l00391"></a><span class="lineno">  391</span>&#160;    <span class="keywordflow">if</span> ( <span class="keywordtype">object</span> == parent() &amp;&amp; event-&gt;type() == QEvent::Resize )</div>
<div class="line"><a name="l00392"></a><span class="lineno">  392</span>&#160;    {</div>
<div class="line"><a name="l00393"></a><span class="lineno">  393</span>&#160;        QResizeEvent* <a class="code" href="class_qwt_widget_overlay.html#ac3b6ff63f7d967a11dbcdbba5e87fba3">resizeEvent</a> = <span class="keyword">static_cast&lt;</span> QResizeEvent* <span class="keyword">&gt;</span>( event );</div>
<div class="line"><a name="l00394"></a><span class="lineno">  394</span>&#160;        resize( <a class="code" href="class_qwt_widget_overlay.html#ac3b6ff63f7d967a11dbcdbba5e87fba3">resizeEvent</a>-&gt;size() );</div>
<div class="line"><a name="l00395"></a><span class="lineno">  395</span>&#160;    }</div>
<div class="line"><a name="l00396"></a><span class="lineno">  396</span>&#160; </div>
<div class="line"><a name="l00397"></a><span class="lineno">  397</span>&#160;    <span class="keywordflow">return</span> QObject::eventFilter( <span class="keywordtype">object</span>, event );</div>
<div class="line"><a name="l00398"></a><span class="lineno">  398</span>&#160;}</div>
<div class="ttc" id="aclass_q_vector_html"><div class="ttname"><a href="class_q_vector.html">QVector</a></div><div class="ttdef"><b>Definition:</b> <a href="qwt__clipper_8h_source.html#l00023">qwt_clipper.h:23</a></div></div>
<div class="ttc" id="aclass_qwt_painter_html_af352ad92f1c1dc8cfee0f3d799e2e26e"><div class="ttname"><a href="class_qwt_painter.html#af352ad92f1c1dc8cfee0f3d799e2e26e">QwtPainter::isX11GraphicsSystem</a></div><div class="ttdeci">static bool isX11GraphicsSystem()</div><div class="ttdef"><b>Definition:</b> <a href="qwt__painter_8cpp_source.html#l00233">qwt_painter.cpp:233</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html"><div class="ttname"><a href="class_qwt_widget_overlay.html">QwtWidgetOverlay</a></div><div class="ttdoc">An overlay for a widget.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00040">qwt_widget_overlay.h:41</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a231231eebaf7655f8264d2ee2b03127c"><div class="ttname"><a href="class_qwt_widget_overlay.html#a231231eebaf7655f8264d2ee2b03127c">QwtWidgetOverlay::updateOverlay</a></div><div class="ttdeci">void updateOverlay()</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00195">qwt_widget_overlay.cpp:195</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a413679fb15e072d5a404f237062b75fc"><div class="ttname"><a href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fc">QwtWidgetOverlay::MaskMode</a></div><div class="ttdeci">MaskMode</div><div class="ttdoc">Mask mode.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00060">qwt_widget_overlay.h:61</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a413679fb15e072d5a404f237062b75fca263c0fea842a8d4957ded6f5e47f734e"><div class="ttname"><a href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fca263c0fea842a8d4957ded6f5e47f734e">QwtWidgetOverlay::AlphaMask</a></div><div class="ttdeci">@ AlphaMask</div><div class="ttdoc">Calculate a mask by checking the alpha values.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00085">qwt_widget_overlay.h:84</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a413679fb15e072d5a404f237062b75fcaa3c2ba9dd41304c6a6524ee5f7c70540"><div class="ttname"><a href="class_qwt_widget_overlay.html#a413679fb15e072d5a404f237062b75fcaa3c2ba9dd41304c6a6524ee5f7c70540">QwtWidgetOverlay::MaskHint</a></div><div class="ttdeci">@ MaskHint</div><div class="ttdoc">Use maskHint() as mask.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00072">qwt_widget_overlay.h:72</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a56828c036263679fc95087bd87496df0"><div class="ttname"><a href="class_qwt_widget_overlay.html#a56828c036263679fc95087bd87496df0">QwtWidgetOverlay::setMaskMode</a></div><div class="ttdeci">void setMaskMode(MaskMode)</div><div class="ttdoc">Specify how to find the mask for the overlay.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00154">qwt_widget_overlay.cpp:154</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a57b667e51da323b6ad050646782f7557"><div class="ttname"><a href="class_qwt_widget_overlay.html#a57b667e51da323b6ad050646782f7557">QwtWidgetOverlay::eventFilter</a></div><div class="ttdeci">virtual bool eventFilter(QObject *, QEvent *) override</div><div class="ttdoc">Event filter.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00389">qwt_widget_overlay.cpp:389</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a80fd06e2111993848f45a21627ec09b4"><div class="ttname"><a href="class_qwt_widget_overlay.html#a80fd06e2111993848f45a21627ec09b4">QwtWidgetOverlay::setRenderMode</a></div><div class="ttdeci">void setRenderMode(RenderMode)</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00178">qwt_widget_overlay.cpp:178</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_a8bc543750c853240841b9931ad167a90"><div class="ttname"><a href="class_qwt_widget_overlay.html#a8bc543750c853240841b9931ad167a90">QwtWidgetOverlay::maskMode</a></div><div class="ttdeci">MaskMode maskMode() const</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00167">qwt_widget_overlay.cpp:167</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_aaa37eb374f4a8886154e86f7531d9264"><div class="ttname"><a href="class_qwt_widget_overlay.html#aaa37eb374f4a8886154e86f7531d9264">QwtWidgetOverlay::renderMode</a></div><div class="ttdeci">RenderMode renderMode() const</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00187">qwt_widget_overlay.cpp:187</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_aaa8358f3b841b733d69e62aa645783d8"><div class="ttname"><a href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8">QwtWidgetOverlay::RenderMode</a></div><div class="ttdeci">RenderMode</div><div class="ttdoc">Render mode.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00102">qwt_widget_overlay.h:103</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_aaa8358f3b841b733d69e62aa645783d8a831530722d8dc0e42aabfbcacbb6ecc6"><div class="ttname"><a href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8a831530722d8dc0e42aabfbcacbb6ecc6">QwtWidgetOverlay::AutoRenderMode</a></div><div class="ttdeci">@ AutoRenderMode</div><div class="ttdoc">Copy the buffer, when using the raster paint engine.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00105">qwt_widget_overlay.h:105</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_aaa8358f3b841b733d69e62aa645783d8a923e121c1d01bb72deb897a6f913aaf5"><div class="ttname"><a href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8a923e121c1d01bb72deb897a6f913aaf5">QwtWidgetOverlay::CopyAlphaMask</a></div><div class="ttdeci">@ CopyAlphaMask</div><div class="ttdoc">Always copy the buffer.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00108">qwt_widget_overlay.h:108</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_aaa8358f3b841b733d69e62aa645783d8ab4b3bfef277a5231f8632a6800a256d8"><div class="ttname"><a href="class_qwt_widget_overlay.html#aaa8358f3b841b733d69e62aa645783d8ab4b3bfef277a5231f8632a6800a256d8">QwtWidgetOverlay::DrawOverlay</a></div><div class="ttdeci">@ DrawOverlay</div><div class="ttdoc">Never copy the buffer.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8h_source.html#l00112">qwt_widget_overlay.h:111</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_abb69235d3eba71b6dde354c668dd2611"><div class="ttname"><a href="class_qwt_widget_overlay.html#abb69235d3eba71b6dde354c668dd2611">QwtWidgetOverlay::drawOverlay</a></div><div class="ttdeci">virtual void drawOverlay(QPainter *painter) const =0</div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_ac3b6ff63f7d967a11dbcdbba5e87fba3"><div class="ttname"><a href="class_qwt_widget_overlay.html#ac3b6ff63f7d967a11dbcdbba5e87fba3">QwtWidgetOverlay::resizeEvent</a></div><div class="ttdeci">virtual void resizeEvent(QResizeEvent *) override</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00323">qwt_widget_overlay.cpp:323</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_ace7c2004890a1bf6e0a01d210ee39007"><div class="ttname"><a href="class_qwt_widget_overlay.html#ace7c2004890a1bf6e0a01d210ee39007">QwtWidgetOverlay::maskHint</a></div><div class="ttdeci">virtual QRegion maskHint() const</div><div class="ttdoc">Calculate an approximation for the mask.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00373">qwt_widget_overlay.cpp:373</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_add1d4279859464de97247350734715f8"><div class="ttname"><a href="class_qwt_widget_overlay.html#add1d4279859464de97247350734715f8">QwtWidgetOverlay::paintEvent</a></div><div class="ttdeci">virtual void paintEvent(QPaintEvent *) override</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00261">qwt_widget_overlay.cpp:261</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_af234383cb42288746b970fb3fa18395d"><div class="ttname"><a href="class_qwt_widget_overlay.html#af234383cb42288746b970fb3fa18395d">QwtWidgetOverlay::~QwtWidgetOverlay</a></div><div class="ttdeci">virtual ~QwtWidgetOverlay()</div><div class="ttdoc">Destructor.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00143">qwt_widget_overlay.cpp:143</a></div></div>
<div class="ttc" id="aclass_qwt_widget_overlay_html_afeb3615cf79bee41bbae21f3b92b924d"><div class="ttname"><a href="class_qwt_widget_overlay.html#afeb3615cf79bee41bbae21f3b92b924d">QwtWidgetOverlay::QwtWidgetOverlay</a></div><div class="ttdeci">QwtWidgetOverlay(QWidget *)</div><div class="ttdoc">Constructor.</div><div class="ttdef"><b>Definition:</b> <a href="qwt__widget__overlay_8cpp_source.html#l00126">qwt_widget_overlay.cpp:126</a></div></div>
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